Inclosed-switch construction



H, M. BROADWELL.

INCLOSED SWITCH CONSTRUCTION. APPLICAHON FILED DEC. 13, 1919 UNITED STATES PATENT OFFICE.

HERQY M. BROADWELL, F PLAIN'VILLE, CONNECTICUT, ASSIGNOB TO THE TRUM- IBULL ELECTRIC MANUFACTURING- COMPANY, OF PLAINVILLE, CONNECTICUT, A.

conronnrron or commcrrcnr- INCLOSED-SWITCH CONSTRUCTION.

Specification of Letters Patent.

Patented Sept. 14, 1920.

To all whom it may concern:

Be it known that I, HARRY M. BROAD- wnLL, a citizen of the United States of America, residing at Plainville, Connectiout, have invented a new and useful Inclosed-Switch Construction, of which the following is a specification.

My invention relates particularly to a safety type of switch and the main object is to provide a shield or guard which can be made cheaply and readily assembled and yet which can be securely held in place.

In its simplest form the invention contemplates the employment of lugs or brack- 1 ets carried by the inner side walls. The shield or guard plate is provided with spe cial tongues adapted to interlock with these lugs by a simple sliding action. One end of the guard plate or shield may be fastened to'tlie end wall of the box in any suitable,

manner.

Figure 1' is a front view or" an inclosed switch construction embodying the improve-= ments of my invention, the cover being open and only a fragment of it shown.

Fig. 2 is a longitudinal sectional view.

Fig. 3 is a perspective view showing fragments of the box and the guard plate or shield separated.

Fig. 4 is a transverse sectional view showing a flanged type of box.

The body 5 of the box is any suitable construction and may be provided with any suitable type of cover 6.

Any form of switch mechanism, 7 mounted in the box. The method of opersting the switch is immaterial but it is usual to employ some form of external handle (not The guard plate or shield 8 is adapts; to in the upper edge the box and cover over all the live parts of leaving only the fuse exposed. port the shield l have pro i o brackets 9-9 which are sui =biy seen J1 g ct toward 1) lie edges of the shield.

- he no;-

afford seats i0 whicn supp-cits with the lugs 9-9. In the form shown herein these tongues are integral with the shield and are formed by cutting parts of the edges of the shield and bending them down into the plane parallel with the main part of the shield leaving just enough space for receiving the lugs 9-9.

The shield may be secured in place by a single screw 12' or other suitable fastening device or seal.

To assemble the parts it is simply necessary to put the shield into position on the lugs 9--9 and slide it endwise toward the lug 10. The tongues 11-11 slide underneath the lugs 9-9 and when the screw 12 or other fastening device is in place the 7c shield is securely held against movement and the operator is protected from accidental contact with any live part of the switch.

The construction is such that the shield may be located substantially flush with the Y upper edge of the box and this allows the maximum space in the box for a switch and a maximum clearance.

in the form shown in Fig. the body of the box is provided with flanges 13 around the edge.

it should be understood that l have only shown one "form of my invention and that contemplate that modifications be ma e in details of the construction without departing from the spirit or so pe of my invention.

1 claim i. In an inclosed combination o a b F3 wardly from the on t mg inwardly from the 0 oems and a shield i'MLVli' ton end of the shield to o 2. In an inclosed combination of a bin, wardly from the sides thereof, a ing tongues the side adapted ably engage sai merit of the shiel a securing the end preventing l7 D on said lugs and having tongues adapted to slidably engage beneath a plurality of said lugs, and means for preventing end-Wise movement of said shield.

4. In an inclosed switch construction, the combination of a box, lugs projecting from the inner Walls thereof, a shield having tongues cut from the edges thereof, and having their free ends lying in planes spaced I apart from the lower face of the shield and 10 

